2nd Skin Moist Pads (non-sterile) are hydrogel pads made from 95% de-ionized, pure water. They provide a moist, comfortable barrier to help keep the skin clean. Adhesive Knit is made from a highly breathable, medical grade, non-woven fabric with the ability to stretch, conform, and fit securely against the skin. It is ideal for holding the 2nd Skin Moist Pads in place. Pressure Pads protect hot spots on the skin against rubbing and friction.